Question 189978
c-5d=2
2c+d=4


when c=1 the value of d goes 0.5
same c=7 -------------d----- 1 
 
now in the same way put the values for 2c+d=4
  when c=1  value of d=2
  when c=2    value of d=1



now plot the graph  n fount the intersection point or do either by simply solving these two equations.

  c-5d=2  *2 ( multiply it by 2 for solving the eq)
 2c+ d=4
-  -   -
_________
   11d=0 >>>> d=0

now for value c we putting value of d in 1st eq
c-5*0=2
c=2

so the intersection point of these two linear eq are (2,0)